Coke-oven



H. W. BUHLER.

COKE O'VEN.

PPLlCATlON HLED JAN-24, 1911.

Patented Oct. 28, 1919.

3 SHEETSSHEET 1.

Arm/mu H. W. BUHLER.

COKE 0VEN. APPLICATION HLED JAN-24.1917.

1 ,3 1 9,841 Patented Oct. 28, 1919.

3 SHEETS-SHEET 2.

A TTOR/VEY H. WQBUHLER! COKE OVEN.

AEFLICATION FILED JAN-24.1917- INII/ENTOR 3 SHEETS-SHEET 3.

Patented Oct. 28, 1919.

A TTORNEY I HENRY W. BUHLER, 013 BOSTON, MASSACHUSETTS. i

COKE-OVEN.

Specification of Letters Patent.

Patented Oct. 28, 1919.

Application filed January 24, 1917. Serial No. 144,170.

To all whom it may concern:

Be it known that I, HENRY W. BUHLER, a citizen of the United States of America, residing at Boston, county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Coke- Ovens, of which the following is a specification.

My invention relates to coke ovens. generally and more specifically comprises improvements designed for use in by-product coke ovens having batteries of horizontally extending retorts located side by side, With horizontally extending heating flues located in the walls between the retorts. In apparatus of this kind heretofore built there has been difficulty in controlling the combustion in the multiplicit of fines individually or by small groups, and in obtaining access to these flues for inspection or repair. The Oh ject of the present invention is to overcome these difficulties in multiple flue construction and to secure therein the utmost flexibility of control and accessibility to all interior parts for observation or repair. The best form of apparatus at present known to me embodying my invention is illustrated in the accompanying drawings in which,

Figure 1 is a vertical cross section througn a battery of coke ovens constructed in accordance with my invention taken on several difl'erent planes. The portion of Fig. 1 to the left of line W-X shows a section taken on broken line AB of Fig. 2, while the portion to the right of line WX shows a section taken on broken line C-D of Fig. 2. The upper half of Fig. 1 is all in planes passing through the centers of heating .flues so that the effect is the same as though it were one section taken on line 11 of Fig. 3, but the section of the left hand lower portion of Fig. 1 passes throughv the waste gas passages of one of the recuperators below the oven while the section of the right hand lower portion passes through the air inlet tubes of such a recuperator.

Fig. 2 is a longitudinal vertical section of such battery of ovens taken on planes at right angles to the longest dimensions of theretorts, parts being broken away or omitted, the portion to the left of line YZ being on broken line EF of Fig. 1, looking to the right, and the portion to the right of line YZ being on line G-H of Fig. 1, looking to the left, dampers 8, having been removed.

Fig. 3'is a horizontal section on line IJ of Fig. 1, parts being broken away or omitted, and

Flg. 4 1s a snnilar horizontal-section on line K-L of Fig. 1.

Throughout the drawings like referencecharacters indicate like parts, 1, l, are the retorts or coking chambers arranged side by side and having their longest dimensions extending horizontally as indicated in Figs. 1 and 3. In the lining of walls 5, 5, between the retorts are a series of horizontally extending heating fiues 2, 2, arranged one above another, formed by vertical portions 3, 3, and horizontal portions 4, 4, of' the retort linings. These linings are backed by the main partition walls 5, 5, which entirely separate each retort 1, and its surrounding heating flues, from every other retort and set of heating flues. Partition walls 11, 11,

extending in a vertical plane cutting the battery of ovens midway of the length of the retorts divide the heating flues into two main groups, one group serving the right hand halves of the retorts 1, (looking at Fins. 1 and 3) and the other group serving the left hand halves. This same walL 11, also extends downward and divides the hot blast stoves below the ovens into two groups as indicated in Fig. 1. At the inner end of each flue 2, is an outlet port 7, formed by an opening in end wall 6. This outlet port is controlled by a loose damper 8, placed against the outer face of the port. 9, is a lip on the end of the fiue floor for preventing damper 8, from moving away from the port 7 when being slid back and forth across the same to vary itsefl'ective opening (see Figs. 1 and 3). These dampers are supposed to be removed in "Fig. 2. All of the sub-group'of flues 2, 2, on one side of each retort at one end thereof are connected through the ports 7., 7, to a vertical" flue 10, which has an extension 13, through the top wall 41, of the oven, which is normally closed by covers 12, and 14. At the bottom of flue 10 is a sliding damper 15, controlling the outlet to channel 16. The two flues 10,

to chimney flue 22.

flue 27 (see .Fig. 2).

Fluid fuel such as coal gas is supplied to flues 2, 2, from pipes 33, through burners or nozzles 3%, controlled by valves 35, and discharging into ports 36, at the outer end of each flue.

Hot air is supplied to each flue 2, through an individual port 29, opening into each flue near the end of the gas burner. The ports 29, of the adjacent sub-groups of fines between the adjacent ends of each pair of retorts connect with a common vertical air flue 27. The opening of each port 29, to flue 27, is controlled by an individual damper 28, which may be a sliding tile operated by a rod inserted through horizontal passage 37, normally closed by cover 38. Inspection of each flue 27, as well as access to it for any other purpose, can be had through a passage 31, in top wall 41, normally closed by covers 30 and 32. Hot air is delivered at the bottom of each flue 27, by branches or distributing passageways 25, 25, from the collecting chambers 25, at the tops of the two recuperators located under the ends of the retorts 1, 1, served by that Flow through each pair of branches 25 25 is controlled by dampers 26, .26, (see Figs. 2 and l) which may be manipulated by a tool inserted through a passage 39, in the outer wall normally closed by cover (see Fig. 4). Air for each recuperator enters through inlet 23, and chamber 24, to the lower ends of vertical tubes 42, 42, the upper ends of which discharge into collecting chamber These tubes 42, are sandwiched in layers between waste gas passages 1'2", 1?, i8, 18, and

19, 19, all as shown in Figs. 1 and 2.

The mode of operation of my invention as above indicated is as follows: Air enters at 23, passes through tubes 42, 42, of each recuperator to its collectingchamber 25, where each stream divides and passes to either side of the retort above that particular recuperator. When the divided stream of heated air enters a flue 27, it mingles with a similarly divided stream from the next adjacent recuperator. tained for each flue 27, is distributed between the two sub-groups of heating flues connected thereto, and among the individual fines of each group. In'each flue 2, the gas from its burner combines with the heated.

air delivered to the flue as above described, to produce combustion, the heat of which combustion is conducted through fire brick linings 3, and 4, to the coal in retort 1, coking the same. The flame and gases of combustion then pass out through ports 7 to flue 10, down to waste gas passages 17, 18 and 19 of the recuperator immediately beneath the flue 2, and thence to the chimney. The combustion in each heating flue can be controlled by manipulation of gas valve 35, air damper 28, and outlet damper 8,one or The joint flow thus ob-' contally extending com more of all of them. The combustion in each pair of sub-groups of heating flues about any 15, 21, one or'more or all of them. Th the degrees of heat applied at diflerent levels of any retort can be adjusted relatively as desired, and then the. intensity of heat applied to either end of any retort can be varied asa whole without aflecting the relative intensities at the different levels as already adjusted. As the pair of sub-groups of flues between every two retorts are supplied with hot air from two recuperators, any inequalities in the heating action tending to develop because of inefficient action of one stove will be partly compensated for by the normally hot air supplied from those on either side of the first mentioned one.

It is evident that a coking apparatus constructed as above described has the desired advantages of flexibility of heating control, and accessibility fully developed.

I wish it understood that various changes can, be made in the details of construction shown and described without departing from the substance of my invention so long as the general principles of operation and coaction of parts herein set forth are preserved.

Having described my invention, I claim:

1. The combination in a coking apparatus of a retort, four groups of heating flues located two on each side of the retort so as to form pairs at each-end of the retort, common air and waste gas connections for the two opposite groups forming each pair, independeiit means for controlling the chimney draft from each group of flues, and common means for controlling the chimney draft from each end pair of groups.

2. The combination in a coking apparatus of a retort composed of a horizontally extending chamber or oven, a plurality of horizontally extending combustion flues in the side walls of the oven arranged in four subgroups, the members of each group being arranged one above another, independent air, fuel and waste gas connections to each flue and means for independently controlling each said connection, a common air supply connection for each sub-group, and individual means for controlling that connection, a common. waste gas flue for each sub-group and individual means for controliiing the passage through said waste gas 8. The combinationin a coking apparatus of a retort composed of a horizontally eX- tending chamber or oven a plurality of horibustion flues in the side walls of the oven arranged in four subgroups, the members of each group being arranged one above another, independent air, fuel and waste gas connections to each flue and means for independently controlling each said connection, a common .air supply connection for each sub-group, and individual means for controlling that connection, a common waste gas flue for each sub-group and individual means for controlling the passage through said waste gas flue, together with a common air inlet connection for the pair of sub-groups of flues at each end of the oven and a common chimney connection for each of said pairs of subgroups of flues and means forindependently controlling each of these connections.

4:. The combination in a coking apparatus of a retort composed of a horizontally extending chamber or oven, aplurality of horizontally extending combustion flues in the side walls of the oven arranged in four sub-groups, the members of each roup being arranged one above another, lndependconnection for each of said pairs of subgroups of flues and means for independently controlling each of these connections, the means for controlling each air and waste gas connection herein referred to comprising a'movable damper, and the retort walls being provided with passageways through which access may be had to each damper from the exterior of theapparatus.

HENRY W. BUHLER. 

